well i've been dealing with slp for about 5 years now. they got good pipes but like all aftermarket companys they say 8 horse but it's a little here and little here. it's never a true 8 horse.as for dynoport i've heard nothing but bad things about them, but thats just peoples opinion. all ya got to do is clutch it the right way and you got a bad a## sled. good luck choosing
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